.allcover {
  position: absolute;
  top: 0;
  left: 0;
}
.center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.ct {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}
.cl {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.bs {
  box-sizing: border-box;
}
.mg {
  margin: 0 auto;
}
